I have a unit but haven't visited in two years. Do units require keys? If so, is there any way to find out what kind of lock is on the units? So I can figure out if one of my ten million keys matches it :)

The unit would require a key that you'd have. Even if you don't have a key, they can cut it off and you could buy one of their nice locks and get your new keys.

I didn't see units with built-in locks; only hasps for which you provided your own lock. You probably used your own lock or one the staff sold you. Staff is very friendly & accommodating, so I would contact them if you can't locate your key.

usually cube smart sells u a round lock of thier own its covered in insurance of yer storage...itll have a red tip on key from cube smart